PI SAGITTARII


'Pi Sagittarii' (π Sgr / π Sagittarii) is a triple star system in the constellation Sagittarius. It also has the traditional name 'Albaldah'. It is known as 建三 (the Third Star of the Establishment) in Chinese. The star is 440 light years from Earth.
Albaldah has an apparent magnitude of +2.88 and belongs to the spectral class F2II. Albaldah has two companions in close orbits. 'Pi Sagittarii B' is located 0.1 arcseconds from Albaldah, or at least 13 Astronomical Units (AU). The second companion, the 6th magnitude 'Pi Sagittarii C', is 0.4 arcseconds away, or at least 40 AU.
Because it is close to the ecliptic, Albaldah can sometimes be occulted by the Moon, and very rarely, planets of our solar system. The next occultation by a planet takes place on February 17, 2035 when it will be occulted by Venus.

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